# This is an automatically generated file.
# DO NOT EDIT or your changes may be overwritten
from __future__ import annotations
import base64
import json
from xdrlib3 import Packer, Unpacker
from .alpha_num4 import AlphaNum4
from .alpha_num12 import AlphaNum12
from .asset_type import AssetType
from .base import DEFAULT_XDR_MAX_DEPTH
from .liquidity_pool_parameters import LiquidityPoolParameters
__all__ = ["ChangeTrustAsset"]
[docs]
class ChangeTrustAsset:
"""
XDR Source Code::
union ChangeTrustAsset switch (AssetType type)
{
case ASSET_TYPE_NATIVE: // Not credit
void;
case ASSET_TYPE_CREDIT_ALPHANUM4:
AlphaNum4 alphaNum4;
case ASSET_TYPE_CREDIT_ALPHANUM12:
AlphaNum12 alphaNum12;
case ASSET_TYPE_POOL_SHARE:
LiquidityPoolParameters liquidityPool;
// add other asset types here in the future
};
"""
def __init__(
self,
type: AssetType,
alpha_num4: AlphaNum4 | None = None,
alpha_num12: AlphaNum12 | None = None,
liquidity_pool: LiquidityPoolParameters | None = None,
) -> None:
self.type = type
self.alpha_num4 = alpha_num4
self.alpha_num12 = alpha_num12
self.liquidity_pool = liquidity_pool
def pack(self, packer: Packer) -> None:
self.type.pack(packer)
if self.type == AssetType.ASSET_TYPE_NATIVE:
return
if self.type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM4:
if self.alpha_num4 is None:
raise ValueError("alpha_num4 should not be None.")
self.alpha_num4.pack(packer)
return
if self.type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM12:
if self.alpha_num12 is None:
raise ValueError("alpha_num12 should not be None.")
self.alpha_num12.pack(packer)
return
if self.type == AssetType.ASSET_TYPE_POOL_SHARE:
if self.liquidity_pool is None:
raise ValueError("liquidity_pool should not be None.")
self.liquidity_pool.pack(packer)
return
raise ValueError("Invalid type.")
@classmethod
def unpack(
cls, unpacker: Unpacker, depth_limit: int = DEFAULT_XDR_MAX_DEPTH
) -> ChangeTrustAsset:
if depth_limit <= 0:
raise ValueError("Maximum decoding depth reached")
type = AssetType.unpack(unpacker)
if type == AssetType.ASSET_TYPE_NATIVE:
return cls(type=type)
if type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM4:
alpha_num4 = AlphaNum4.unpack(unpacker, depth_limit - 1)
return cls(type=type, alpha_num4=alpha_num4)
if type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM12:
alpha_num12 = AlphaNum12.unpack(unpacker, depth_limit - 1)
return cls(type=type, alpha_num12=alpha_num12)
if type == AssetType.ASSET_TYPE_POOL_SHARE:
liquidity_pool = LiquidityPoolParameters.unpack(unpacker, depth_limit - 1)
return cls(type=type, liquidity_pool=liquidity_pool)
raise ValueError("Invalid type.")
def to_xdr_bytes(self) -> bytes:
packer = Packer()
self.pack(packer)
return packer.get_buffer()
@classmethod
def from_xdr_bytes(cls, xdr: bytes) -> ChangeTrustAsset:
unpacker = Unpacker(xdr)
result = cls.unpack(unpacker)
remaining = len(xdr) - unpacker.get_position()
if remaining != 0:
raise ValueError(f"Unexpected trailing {remaining} bytes in XDR data")
return result
def to_xdr(self) -> str:
xdr_bytes = self.to_xdr_bytes()
return base64.b64encode(xdr_bytes).decode()
@classmethod
def from_xdr(cls, xdr: str) -> ChangeTrustAsset:
xdr_bytes = base64.b64decode(xdr.encode())
return cls.from_xdr_bytes(xdr_bytes)
def to_json(self) -> str:
return json.dumps(self.to_json_dict())
@classmethod
def from_json(cls, json_str: str) -> ChangeTrustAsset:
return cls.from_json_dict(json.loads(json_str))
def to_json_dict(self):
if self.type == AssetType.ASSET_TYPE_NATIVE:
return "native"
if self.type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM4:
assert self.alpha_num4 is not None
return {"credit_alphanum4": self.alpha_num4.to_json_dict()}
if self.type == AssetType.ASSET_TYPE_CREDIT_ALPHANUM12:
assert self.alpha_num12 is not None
return {"credit_alphanum12": self.alpha_num12.to_json_dict()}
if self.type == AssetType.ASSET_TYPE_POOL_SHARE:
assert self.liquidity_pool is not None
return {"pool_share": self.liquidity_pool.to_json_dict()}
raise ValueError(f"Unknown type in ChangeTrustAsset: {self.type}")
@classmethod
def from_json_dict(cls, json_value: str | dict) -> ChangeTrustAsset:
if isinstance(json_value, str):
if json_value not in ("native",):
raise ValueError(
f"Unexpected string '{json_value}' for ChangeTrustAsset, must be one of: native"
)
type = AssetType.from_json_dict(json_value)
return cls(type=type)
if not isinstance(json_value, dict) or len(json_value) != 1:
raise ValueError(
f"Expected a single-key object for ChangeTrustAsset, got: {json_value}"
)
key = next(iter(json_value))
type = AssetType.from_json_dict(key)
if key == "credit_alphanum4":
alpha_num4 = AlphaNum4.from_json_dict(json_value["credit_alphanum4"])
return cls(type=type, alpha_num4=alpha_num4)
if key == "credit_alphanum12":
alpha_num12 = AlphaNum12.from_json_dict(json_value["credit_alphanum12"])
return cls(type=type, alpha_num12=alpha_num12)
if key == "pool_share":
liquidity_pool = LiquidityPoolParameters.from_json_dict(
json_value["pool_share"]
)
return cls(type=type, liquidity_pool=liquidity_pool)
raise ValueError(f"Unknown key '{key}' for ChangeTrustAsset")
def __hash__(self):
return hash(
(
self.type,
self.alpha_num4,
self.alpha_num12,
self.liquidity_pool,
)
)
def __eq__(self, other: object):
if not isinstance(other, self.__class__):
return NotImplemented
return (
self.type == other.type
and self.alpha_num4 == other.alpha_num4
and self.alpha_num12 == other.alpha_num12
and self.liquidity_pool == other.liquidity_pool
)
def __repr__(self):
out = []
out.append(f"type={self.type}")
if self.alpha_num4 is not None:
out.append(f"alpha_num4={self.alpha_num4}")
if self.alpha_num12 is not None:
out.append(f"alpha_num12={self.alpha_num12}")
if self.liquidity_pool is not None:
out.append(f"liquidity_pool={self.liquidity_pool}")
return f"<ChangeTrustAsset [{', '.join(out)}]>"